In Odin and hit on start flash button after the finish, a popup will appear in mobile accept it.do not use if your device version not same. select G950FXXU1AQDA file into PDA field.
you need to download ADBenabled and extract the file on the desktop.These commands an idea of what you can do with ADB and fastboot. Method 1 How to Remove FRP by ADB Command/Removed ADB Files S8+ Plus Samsung Frp Tool With ADB Enable Files Free Download